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Input Type Choices SI UnitElectricalCurrentPower RatePower ConsumptionLuminationamperes (A)milliamperes (MA)watts (W)kilowatts (KW)watt-hours (WH)kilowatt-hours(KWH)foot-candles (FTC)lux (LUX)Table 2-2 - SI Units for Analog Inputsamperes (A)watts (W)watt-hours(WH)lux (LUX)NumericConstantTypesExamplesDescriptionIntegers 7, -30 Whole numbers. A minussign in front will make itnegative.Non-integers 1.0, -0.3,3.14Also called decimal or floating-pointvalues. A minussign in front will make itnegative.Digital Input Values and Analog ConversionA digital input value is converted to a numerical valuewhen read into Flexible Combiner equations. A digitalinput that is ON is treated as a unitless analog value of 1.0.An OFF is treated as an analog value of 0.0. Logical operatorssuch as AND, OR, XOR, and other functions typicallyused to combine digital inputs are all designed totreat non-zero values as ONs for purposes of logic, andzero values as OFFs.ExponentialNumbers1.1E04-4.5E-12Large numbers can beentered in exponential format.Format should be anumber with one significantdigit to the left of the decimal,followed by an E, thenfollowed by an integer thatcorresponds to the power often the number will be multipliedby. Example: 1.1E06is 1.1 times 10 to the sixthpower, or 1,100,000.AI4AI1+AI2+AI3EXAMPLE EQUATIONS: INPUTSEquationTable 2-3 - Equation Examples: InputsDescriptionThe real-time value of AI4Total sum of inputs AI1,AI2, and AI3Table 2-4 - Numeric ConstantsA minus sign to the left ofthe number makes the numbernegative. A minus signin between the E and theexponent specifies a negativeexponent.2.2 ConstantsIn addition to inputs, Flexible Combiner equations willtypically require use of constants. These can be eithernumeric constants (entered as numbers and used as numbers),named consents (named strings that are parsed asnumbers), or time constants (times of day used in comparisons).Table 2-4 and Table 2-5 show the differenttypes of numeric and named constants.NamedConstantDescriptionPI The value of pi (3.1415926535897)TRUEFALSEONOFF1.0 (to signify a logical TRUE)0.0 (to signify a logical FALSE)1.0 (to signify a logical ON)0.0 (to signify a logical OFF)Table 2-5 - Named Constants2.2.1 Constants and EngineeringUnitsNumerical and named constants are assumed to be2-2 • E2 User’s Manual Supplement: Flexible Combiner 026-1620 Rev 0 09-15-05
unitless numbers. In other words, a “3.0” in an equation byitself is not assumed to be 3.0 degrees or kilowatts. However,when used with a function or operator that involvesinputs of a specific type, the result of the operation orfunction will use the inputs’ engineering unit designation.For example, if analog input AI6 is a 0-100% humiditysensor that is currently reading a humidity of 50%, theresult of the equation “AI6 / 5” will result in an outputvalue of 10%, even though the number 5 has no unit.2.2.2 Specifying a Constant’sEngineering Unit with Type SuffixesOccasionally you may want to be specific about a constant’sengineering units. The equation parser supports theuse of a type suffix at the end of a constant to specify aparticular engineering unit. Table 2-1 lists all type suffixesrecognized by the Flexible Combiner’s equation parser.Type suffixes must be placed directly after the constantwith no spaces in between the constant and the suffix (i.e.75DF, not 75 DF).Suffix Unit Suffix UnitDF degrees F % percentDC degrees C W wattsDDF delta degrees F(use this suffixfor offsets)KW kilowattsDDCdelta degrees C(use this suffixfor offsets)WHwatt-hoursDFH °F per hour KWH kilowatt-hoursDFC °C per hour FTC foot-candlesDFM °F per minute LUX luxDCM °C per minute PPM parts per millionINW inches of water OHM ohmsCMW cm of water RPM revolutions perminutePSI pounds persquare inchRPMM RPM per minuteBAR bars DINW differentialinches of waterKPA kilopascals DCMW differential cm ofwaterPA pascals DPSI differential pressurein PSIRH relative humidity DBAR differential inbarsFPM feet per minute DKPA differential inkilopascalsTable 2-1 - Type Suffixes for Flexible Combiner ConstantsSuffix Unit Suffix UnitMPMMPSGPMmeters perminutemeters per secondgallons perminuteDPAGALdifferential inpascalsgallonsIt is important to note that when type suffixes are usedthat are different from the E2’s internal SI values, they are“converted” to the SI units behind the scenes. For example,the equation “AI1+0.2BAR” actually adds 20,000 tothe raw value of AI1 (0.2 bars converted to pascals, or20,000PA).Type Suffixes for Temperature Offsets (DDF andDDC)If you are using a constant in an equation that is beingused to offset the value of a temperature sensor, you mustuse the delta degrees suffixes (DDF and DDC), not thestandard temperature suffixes (DF and DC). A constantwith a DF or DC suffix is interpreted as a literal temperatureand converted before the math operation is performed,so an equation like AI1+10DF is interpreted as “AI1 plusthe value of 10DF converted to Celsius (12.2).” The correctway to write this would be AI1+10DDF, which wouldadd 10°F to the value of AI1 before converting the entireequation to SI units.Use the DDF and DDC suffixes in every equation thatuses basic math in conjunction with temperature offsets.2.2.3 Time ConstantsUsed in delay equations and pulse width (PW) equations,constants representing times of day or delay timedurations can be entered into equations in a variety ofways:• As a duration in HH:MM (hours/minutes).Example: “01:45” sets the time delay to 1 hour, 45minutes (6300 seconds).• As a duration in HH:MM:SS (hours/minutes/seconds). Example: “01:00:00” sets the time delayLlitersLPS liters per second CF cubic feetCFM cubic feet per CM cubic meterminuteCMScubic metersper secondCCFcubic centi-feetV volts CCFH cubic centi-feetper hourA amps FT feetMA milliamps M metersPCT percentTable 2-1 - Type Suffixes for Flexible Combiner ConstantsConstants Constants • 2-3
Page 1: 026-1620 Rev 0 09-15-05E2 User’s
Page 5: Table of Contents1 FLEXIBLE COMBINE
Page 9 and 10: DO1-DO8 TriggerIf any of the DO1-DO
Page 11 and 12: DesiredFunctionAND combinationof di
Page 13: 2 Building EquationsEquations are m
Page 17 and 18: 2.3 OperatorsOperators are symbols
Page 19 and 20: 2.4.1 Extended Math FunctionsFuncti
Page 21 and 22: 2.4.2 Extended Logical FunctionsFun
Page 23 and 24: Function Description ExamplesTANR(v
Page 25 and 26: Function Description ExamplesNEWYEA
Page 27 and 28: 3 Testing and Troubleshooting Equat
Page 29: • Press , then select “ - Overr

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